Boring tool for metallic packing rings



Aug. 4, 1925. 1,548.21)

.- R. A. LIGHT ET AL BdRING TOOL FOR METALLIC PACKINGXRINQSW File'd Deg. 23. 1922 ail law; JaaepbW jia Patented Aug. 4, 1925.

UNITED STATES 1 PATENT OFFICE.

RALPH A. LIGHT AND JOSEPH W. PRICE, JR., OE PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO THE UNITED STATES METALLIC PACKING COMPANY, OF PHILA- DELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA. r

:BORING TOOL non METALLIC IPACKING'RINGS.

Application filed December 23, 1922. -Serial N 0. 608,708.

T 0 all whom it may concern Be it known that we, .RALPII A. LIGHT and Josnrn: W. PRICE, Jr., citizens of'the United States of America, and residents of Philadelphia, in the county of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements in Boring Tools for Metallic Packing Rings, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof.

Gur invention relates to the construction of a boring tool especially adapted for use in boring out metallic packing rings such as are used in connection with piston rods and valve stems. The object of our invention is to provide a tool especially adapted for this service and the nature of our improvements will be best understood as described in connection with the drawings in which Figure 1 is a sectional elevation of our tool, and I Figure 2, a cross sectional elevation taken on the line 22 of Fig. 1, looking toward the left.

A indicates the base plate of the frame of the machine having an upwardly extending web A and substantial upwardly'ex'r tending arms B, B, which support bearings for the shaft of the boring tool. The

left hand arm B is further provided with an annular flange C continued as a cylinder C" from which again continues the ring receiving chuck formed, as shown, of a conical section C merging into a cylindrical section G which is' externally threaded, as shown, and on which screws the clamping ring indicated at D. This construction provides inside of the chuck C G a chamber C in the lower portion of which is formed an opening C for the escape of chips. E and E indicate the bearings secured in the arms B, B. F and F are arms extend ing out from the arms B, B, and support ing a rod F which is pressed through a perforation in the arm F into a socket in the arm F and secured in place by a plug and set screw, as indicated at F G is the shaft of the machine supported and turning in the bearings E, E, having a reduced section G to which is attached the boring tool H, H indicating a screw for clamping the tool in lace. .To the opposite end of the shaft is secured the hand wheel indicated at I. An intermediate por- In operation a packing ring is secured in the chuck by means'of the clamping ring D and the arm J beingengaged through its threaded portion J with a threaded portion G of the shaft, the shaft is rotated with the result that the cutting tool H is rotated and, at the same time, moved longitudinally. Continued rotation of the shaft in either direction brings the aws of the arm 'J into contact with the conical shoulders G which lift the arm J out of con tact withthe threaded portion of the shaft and, of course, arrests the longitudinal movement of the shaft and tool.

Having now, described our invention, what we claim as new and-desire to secure by Letters Patent, is:

A boring tool for metallic packing rings,

comprising a frame having spaced arms in combination with shaft bearings supported in said arms, a ring holding chuck supported on the outside of one arm, a tool holding shaft rotatably and longitudinally supported in the bearings, said shaft having an intermediate portion reduced in diameter and screw threaded and formed with beveled surfaces connecting the ends of the reduced portion with the surface of the shaft and a segmental nut supported on the frame and movable towards and away from the shaft, said nut normally engaging the" threaded portion of the shaft and being disengaged therefrom by the bevels at the ends of the reduced and threaded portion of the shaft.

RALPH A. LIGHT. JOS. W. PRICE, JR. 

